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How does molar mass effect pressure at a constant temp and volume?
Wiki User
∙ 13y ago
Assuming we are dealing with a gas, the ideal gas equation can be used.
P*V = n*R*T
we can solve for n as
n = (P*V)/(R*T)
R can be defined for a specific gas to give the specific gas constant. In which case, we notate as "R-bar".
R-bar = R/Atomic Mass
If the solution under consideration is a liquid or a solid, the ideal gas equation is not valid. Given the volume of the liquid or solid, we can calculate the mass from the density since
density = mass/volume
Then we can find the number of moles of the substance by dividing the mass by the molar mass (check your units on this step).
mass/molar mass = number of moles
Wiki User
∙ 14y ago
Wiki User
∙ 13y agomolar mass and pressure are inversely related..
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How does the molar concentration at Standard temperature and pressure depend upon the identity of the gas?
Molar concentration is defined as the amount of a gas divided by the volume of gas. According to the gas identity, at standard temperature and pressure, even if the amount of the gas is constant, the volume of gas changes. Thus, the molar concentration changes depending on the gas identity.
Explain why the molar volume of a gas at RTP is greater than that of the gas at STP?
At RTP the assumed temperature is 293ºK, at STP the assumed temperature is 273ºK. The formula used for this is Pressure x Volume = moles x ideal gas constant x Temperature. So Volume = (moles x ideal gas constant x temperature) / Pressure Assuming Pressure and moles stays constant... Volume at RTP = ( 1 mole x 8.31451 x 293 K ) / ( 101.325 Pa) Volume at RTP = 24.0429 Volume at RTP = 24.0dm^3 Volume at STP = ( 1 mole * 8.31451 * 273 K ) / ( 101.325 Pa) Volume at STP = 22.4017 Volume at STP = 22.4dm^3
When two gases of a chemical reaction are both at the same temperature and pressure and they have the same molar volume what is their stoichiometric ratio in the chemical equation describing the reac?
If the gases have the same molar volume, the stoichiometric ratio would be one to one. Molar volume is the volume occupied by one mole of a substance. This indicates that there is a 1:1 molar ratio of each gas.
How do you find out the molar mass of a gas given density temperature and pressure?
MolarMass = [density x gas constant x temperature(in kelvin)] / pressure (in atm)
How do you Calculate the molar volume of a gas?
use pv=nrt, where p = pressure , v = volume, n=moles, r is a constant (8.413372) and t is the temperature. you can also use pv/t = pv/t where one side is stp (standard temperature and pressure) and the other side is your information with one variable left over, in your case volume, that you then calculate.
What three things affect airpressure?
Heat, number of molecules, atmospheric pressure and volume Volume * Pressure = molecules * molar gas constant * Heat
Why has a gas two values of molar heat capacities?
Gasses have two specific heat capacities because the boundary conditions can affect the number by up to 60%. Therefore, a number is given to each boundary condition: isobaric (constant pressure) or isochoric (constant volume). In an ideal gas, they differ by the quantity R (the gas constant - the same one you use in the ideal gas law): Cp = Cv + R where Cp is the isobaric molar heat capacity (specific heat) and Cv is the isochoric molar heat capacity.
How does the molar concentration at Standard temperature and pressure depend upon the identity of the gas?
Molar concentration is defined as the amount of a gas divided by the volume of gas. According to the gas identity, at standard temperature and pressure, even if the amount of the gas is constant, the volume of gas changes. Thus, the molar concentration changes depending on the gas identity.
Why we use two type of molar specific heat?
For gases, there is heat specific heat capacity under the assumption that the volume remains constant, and under the assumption that the pressure remains constant. The reason the values are different is that when heating up a gas, in the case of constant pressure it requires additional energy to expand the gas. For solids and liquids, "constant volume" isn't used, since it would require a huge pressure to maintain the constant volume.
How do you prove that the molar heat capacity at the constant volume?
no be quiet
What is the formula for finding pressure?
I suppose you mean the formula for the variation in pressure. The simplest expression of this is, at a fixed temperature,and for a given mass of gas, pressure x volume = constant. This is known as Boyle's Law. If the temperature is changing, then we get two relations: 1. If the pressure is fixed, volume = constant x temperature (absolute) 2. If the volume is fixed, pressure = constant x temperature (absolute) These can be combined into the ideal gas equation Pressure x Volume = constant x Temperature (absolute), or PV = RT where R = the molar gas constant. (Absolute temperature means degrees kelvin, where zero is -273 celsius)
What does molar volume mean for a gas?
Molar gas volume is the volume of ONE moel of gas. It only depends on the pressure and temperature, not on the kind of gas. Molar volume at standard temperature and standard pressure is always 22,4 Litres (for any gas)
Why the molar specific heat at constant pressure is larger than the molar specific heat at constant volume?
This question is wrong. Heat capacity at constant pressure is more than that at constant volume. And Heat capacity at constant pressure - Heat capacity at constant volume= R Cp - Cv= R ,where R is universal gas constant.
What is molar specific heat of solid at constant volume?
This is the necessary heat to raise the temprataure of 1 mol with 1 kelvin, at constant volume.
How do you measure of a gas?
Well there are two ways in the metric system Liters and cubic meters take your pick and the volume can be found from the equation below. (PV= MRT) or (Pressure) * (Volume) = (Molar Mass of Gas) * (R constant) * (Temperature of gas)
Explain why the molar volume of a gas at RTP is greater than that of the gas at STP?
At RTP the assumed temperature is 293ºK, at STP the assumed temperature is 273ºK. The formula used for this is Pressure x Volume = moles x ideal gas constant x Temperature. So Volume = (moles x ideal gas constant x temperature) / Pressure Assuming Pressure and moles stays constant... Volume at RTP = ( 1 mole x 8.31451 x 293 K ) / ( 101.325 Pa) Volume at RTP = 24.0429 Volume at RTP = 24.0dm^3 Volume at STP = ( 1 mole * 8.31451 * 273 K ) / ( 101.325 Pa) Volume at STP = 22.4017 Volume at STP = 22.4dm^3
When two gases of a chemical reaction are both at the same temperature and pressure and they have the same molar volume what is their stoichiometric ratio in the chemical equation describing the reac?
If the gases have the same molar volume, the stoichiometric ratio would be one to one. Molar volume is the volume occupied by one mole of a substance. This indicates that there is a 1:1 molar ratio of each gas.
